868613917 has 2 divisors, whose sum is σ = 868613918. Its totient is φ = 868613916.

The previous prime is 868613897. The next prime is 868613983. The reversal of 868613917 is 719316868.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 685444761 + 183169156 = 26181^2 + 13534^2 .

It is a cyclic number.

It is not a de Polignac number, because 868613917 - 2¹¹ = 868611869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (868613117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434306958 + 434306959.

It is an arithmetic number, because the mean of its divisors is an integer number (434306959).

Almost surely, 2^868613917 is an apocalyptic number.

It is an amenable number.

868613917 is a deficient number, since it is larger than the sum of its proper divisors (1).

868613917 is an equidigital number, since it uses as much as digits as its factorization.

868613917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 49.

The square root of 868613917 is about 29472.2567340881. The cubic root of 868613917 is about 954.1330241981.

The spelling of 868613917 in words is "eight hundred sixty-eight million, six hundred thirteen thousand, nine hundred seventeen".